ULTIMO AGGIORNAMENTO BANCA DATI: 13/09/2024 13:00:57
Dietary fatty acids have been shown to exert a clear effect on the stress response, modulating the release of cortisol. The role of fatty acids on the expression of steroidogenic genes has been described in mammals, but little is known in fish. The effect of different fatty acids on the release of cortisol ...
Background Microalgae are potential sources of biofuels and high-value compounds. Mixotrophic conditions usually promote growth of microalgae. The pennate diatom Phaeodactylum tricornutum, with its short life cycle, completely sequenced genome, and ease of transformation, can be used as a model for ...
The main objective of the CADDY project is to replace a human buddy diver with an autonomous underwater vehicle and add a new autonomous surface vehicle to improve monitoring, assistance, and safety of the diver's mission. However, the use of robots underwater may also bring additional safety requirements. ...
Underwater environment is characterized by harsh conditions and is difficult to monitor. The CADDY project deals with the development of a companion robot devoted to support and to monitor human operations and activities during the dive. In this scenario the communication and correct reception of messages ...
Diving is a dangerous activity during which diver's safety is significantly compromised, both due to unpredictable environment and dependence on technical systems for life support. Introducing the concept of a cognitive autonomous underwater vehicle (AUV), that is capable of guiding, observing and assisting ...
This paper introduces a visual method for diver detection in the context of Human Robot Interaction (HRI). The detection is treated as a classification problem, where a discriminative model is trained by computing image features of the target (diver) and underwater scenery. This type of scenery poses ...
As part of the EU FP7 project CADDY, an efficient and reliable acoustic communication network is required to connect a diver, autonomous underwater vehicle (AUV) and surface vehicle (ASV) working cooperatively. This paper describes the development of the modulation, receiver algorithms and miniature ...
This paper discusses the problem of passive detection of divers in a shallow water environment. The sound produced due to breathing of the open-circuit divers is prominent in the high frequency range of the data. We formulate a detector to detect the waveforms of a diver's breaths, which occur as periodic ...
Diving as a profession and sport is and will be one of the most dangerous disciplines known by man. Water is not a natural habitat for humans and people need equipment to breathe underwater. Failure in the breathing apparatus, burst eardrum, decompression sickness and nitrogen narcosis are just a couple ...
Cognitive Autonomous Diving Buddy (CADDY) is an FP7 project initiated in February 2014. The key objectives of the project are to develop, implement, and demonstrate in the course of missions at sea the efficacy of a number of innovative systems to assist human divers during the execution of demanding ...
The surveillance of illegal fishing activities is a critical issue for the management of marine resources. Here, we address the monitoring of fishing activities from space, namely from VMS data (Vessel Monitoring System). We propose and evaluate a novel method for the recognition of the fishing vessel ...
We examined the effectiveness of LED irradiation on the inhibition of cypris larvae settlement onto an adhesion plate, on which the certain area located just under the light source was continuously covered with the light. So far examined, the inhibition percentage of the population in the area varied ...
The design of an existing in-house scientific instrument was used as a basis to create a new model suitable for deployment onto a fishing industry vessel, with a reduced need for specialized technical support. Some of the planned developmental goals were met directly, whilst others resulted in intermediate ...
Underwater sensors of water flow share issues addressed independently by manufacturers. Power has become the most demanding concern since availability of cheap memory has removed data storage as the limit for self-contained current meters. Neither power nor memory is a limit with cabled observatory ...
This paper investigates how anti-access and area denial (A2/AD) operations can be conducted to deny actors access to cyberspace. It examines multiple facets of cyberspace to identify the potential vulnerabilities within the system that could be exploited. This project will also touch upon the policy ...
Planar motion over a surface is commonly acquired using a combination of rotatory motors and appropriate mechanical transmissions to convert the torque produced by the motor into linear motion. Typically, the assembly employs two motors: one is responsible for the motion in the x-axis and the other, ...
Currently, Indian fishermen use handheld radios or satellite phones for offshore communication. While the former is based on broadcast communication with its range limited by Line-of-Sight, the latter is expensive. Therefore, lack of connectivity-at-sea is a huge problem for many Indian fishermen. Hence, ...
This paper reports on a method to perform robust visual relocalization between temporally separated sets of underwater images gathered by a robot. The place recognition and relocalization problem is more challenging in the underwater environment mainly due to three factors: 1) changes in illumination; ...
Natural muscles exhibit high power-to-weight ratios, inherent compliance and damping, fast actuation and high dynamic ranges. Unfortunately, traditional robotic actuators have been unable to attain similar properties, especially in a slender muscle-like form factor. Recently, super-coiled polymer (SCP) ...
In this paper we present a unique self stabilizing ellipsoidal robot for inspection of underwater structures using the principles of ground effect. Underwater metal structures - whether it is ship hulls or internals of a boiling water reactor - require subsurface inspection to detect internal cracks, ...